Magnesium test cost in Tampa, FL — inpatient
In Tampa-St. Petersburg-Clearwater, FL, 12 hospitals list a cash price for magnesium blood test as an inpatient: from $5.47 to $330.35, with a median of $207.12. The lowest listed price is at Tampa General Hospital — $201.65 less than the median here. Across Florida, the median is $13.20 at 81 hospitals.
Cash prices at 12 facilities across 8 cities for code 83735, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.
Lowest$5.47Tampa General Hospital
Median$207.12half pay less
Highest$330.35in this market
Difference60.4×highest vs lowest
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Tampa-St. Petersburg-Clearwater, FL.
median
Lowest $5.47Highest $330.35
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Tampa General Hospital lowest Tampa, FL · (813) 844-7000 Hb Magnesium 24Hr Urine | $5.47 | $15.64 | — | 65% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Assay Of Magnesium - Magnesium | $5.60 | $14.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Assay Of Magnesium - Magnesium 24Hr Urine | $5.60 | $14.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Assay Of Magnesium - Magnesium Urine | $5.60 | $14.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Assay Of Magnesium - Magnesium | $5.60 | $14.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Assay Of Magnesium - Magnesium 24Hr Urine | $5.60 | $14.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Assay Of Magnesium - Magnesium Urine | $5.60 | $14.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Assay Of Magnesium-Ref | $6.00 | $15.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Magnesium, Urine (Sup24)-Exc | $6.00 | $15.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Magnesium, Urine (Sup24)-Exc | $6.00 | $15.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Assay Of Magnesium-Ref | $6.00 | $15.00 | — | 60% | Apr 1, 2026 source file |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Magnesium Poc | $7.35 | $21.00 | — | 65% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Magnesium, Stool-Ref | $21.20 | $53.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Magnesium, Stool-Ref | $21.20 | $53.00 | — | 60% | Apr 1, 2026 source file |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Rbc Magnesium | $23.10 | $66.00 | — | 65% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Magnesium,Rbc-Ref | $42.40 | $106.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Magnesium,Rbc-Ref | $42.40 | $106.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Magnesium,Rbc-Arup-Ref | $50.00 | $125.00 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Magnesium,Rbc-Arup-Ref | $50.00 | $125.00 | — | 60% | Apr 1, 2026 source file |
| H. Lee Moffitt Cancer Center and Research Institute Hospital Tampa, FL MAGNESIUM LEVEL, OUTSIDE FACILITY | $107.00 | $214.00 | $96.30–$171.20 | 50% | — source file |
| H. Lee Moffitt Cancer Center and Research Institute Hospital Tampa, FL ASSAY OF MAGNESIUM | $107.00 | $214.00 | $96.30–$171.20 | 50% | — source file |
| H. Lee Moffitt Cancer Center and Research Institute Hospital Tampa, FL URN MAGNESIUM RANDOM | $107.00 | $214.00 | $96.30–$171.20 | 50% | — source file |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Magnesium | $115.85 | $331.00 | — | 65% | Apr 1, 2026 source file |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Ionized Magnesium | $128.10 | $366.00 | — | 65% | Apr 1, 2026 source file |
| AdventHealth North Pinellas Tarpon Springs, FL · (813) 615-7219 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $149.45 | $149.45 | — | — | Apr 1, 2026 source file |
| AdventHealth North Pinellas Tarpon Springs, FL · (813) 615-7219 HC MAGNESIUM LEVEL | $149.45 | $149.45 | — | — | Apr 1, 2026 source file |
| AdventHealth Connerton Land O Lakes, FL HC MAGNESIUM LEVEL | $183.40 | $183.40 | — | — | Apr 1, 2026 source file |
| AdventHealth Connerton Land O Lakes, FL HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $183.40 | $183.40 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM TIMED URINE | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM URINE CALCULI RISK ASSESSMENT - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM RBC - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM LEVEL | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM URINE RANDOM | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC CVICU IONIZED MAGNESIUM POC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC ASSAY OF MAGNESIUM - MAGNESIUM IONIZED | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM TIMED URINE | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM URINE CALCULI RISK ASSESSMENT - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM RBC - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM URINE RANDOM | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM URINE RANDOM | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC CVICU IONIZED MAGNESIUM POC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC ASSAY OF MAGNESIUM - MAGNESIUM IONIZED | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM TIMED URINE | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM URINE CALCULI RISK ASSESSMENT - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM - SUPERSATURATION PROFILE, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM RBC - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM LEVEL | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM URINE RANDOM | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC CVICU IONIZED MAGNESIUM POC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC ASSAY OF MAGNESIUM - MAGNESIUM IONIZED | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM TIMED URINE | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM URINE CALCULI RISK ASSESSMENT - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM RBC - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM LEVEL | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM URINE RANDOM | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC CVICU IONIZED MAGNESIUM POC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC ASSAY OF MAGNESIUM - MAGNESIUM IONIZED | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM TIMED URINE | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM URINE CALCULI RISK ASSESSMENT - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM RBC - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM LEVEL | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM LEVEL | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC CVICU IONIZED MAGNESIUM POC | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC ASSAY OF MAGNESIUM - MAGNESIUM IONIZED | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM, URINE - ARUP | $230.83 | $230.83 | — | — | Apr 1, 2026 source file |
| AdventHealth Dade City Dade City, FL · (352) 568-1100 HC MAGNESIUM TIMED URINE | $330.35 | $330.35 | — | — | Apr 1, 2026 source file |
| AdventHealth Dade City Dade City, FL · (352) 568-1100 HC MAGNESIUM URINE RANDOM | $330.35 | $330.35 | — | — | Apr 1, 2026 source file |
| AdventHealth Dade City Dade City, FL · (352) 568-1100 HC MAGNESIUM LEVEL | $330.35 | $330.35 | — | — | Apr 1, 2026 source file |
Inpatient: lowest $5.47, median $207.12, highest $330.35 — a 60.4× difference within the same market.
As an outpatient, the same code is billed by 12 facilities here, median $207.12 — that is the price to compare if you are not being admitted.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What it is
A magnesium test measures the level of magnesium in the blood. Doctors order it for muscle cramps or weakness, an irregular heartbeat, low potassium or calcium that does not correct, and for people on diuretics, long-term acid-reducing drugs or with kidney disease.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.